CVE-2026-20586CWE-787

CVE-2026-20586

High · published October 5, 2026

CVSS v3.1
8.8
EPSS
0%
Percentile
31.0
In the wild
Unconfirmed
What it is

In vdec, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9614.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00382 · 31.0th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-10-05T06:16Z
Affected products (25)
ProductVersionsFixed in
mediatek/mt8910_firmwareall versions—
mediatek/mt2718_firmwareall versions—
mediatek/mt6768_firmwareall versions—
mediatek/mt6789_firmwareall versions—
mediatek/mt6769_firmwareall versions—
mediatek/mt6833_firmwareall versions—
mediatek/mt6855_firmwareall versions—
mediatek/mt6877_firmwareall versions—
mediatek/mt8186_firmwareall versions—
mediatek/mt8188_firmwareall versions—
mediatek/mt8189_firmwareall versions—
mediatek/mt8195_firmwareall versions—
mediatek/mt8196_firmwareall versions—
mediatek/mt8367_firmwareall versions—
mediatek/mt8391_firmwareall versions—
mediatek/mt8395_firmwareall versions—
mediatek/mt8668_firmwareall versions—
mediatek/mt8676_firmwareall versions—
mediatek/mt8678_firmwareall versions—
mediatek/mt8696_firmwareall versions—
mediatek/mt8781_firmwareall versions—
mediatek/mt8788e_firmwareall versions—
mediatek/mt8792_firmwareall versions—
mediatek/mt8793_firmwareall versions—
mediatek/mt8799_firmwareall versions—
References (1)
https://www.mediatek.com/product-security-bulletin/October-2026 · [email protected]
EPSS history
Timeline
  • 07 OCT 03:40Z
    EPSS moved — → 0%
    epss
  • 05 OCT 01:39Z
    In vdec, there is a possible out of bounds write due to a missing bounds check
    cvelistv5